20440203025 has 24 divisors (see below), whose sum is σ = 27656470944. Its totient is φ = 14862134400.

The previous prime is 20440202999. The next prime is 20440203029. The reversal of 20440203025 is 52030204402.

It is not a de Polignac number, because 20440203025 - 2³³ = 11850268433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20440202987 and 20440203005.

It is not an unprimeable number, because it can be changed into a prime (20440203029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2127282 + ... + 2136868.

It is an arithmetic number, because the mean of its divisors is an integer number (1152352956).

Almost surely, 2^20440203025 is an apocalyptic number.

20440203025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20440203025 is a deficient number, since it is larger than the sum of its proper divisors (7216267919).

20440203025 is a wasteful number, since it uses less digits than its factorization.

20440203025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17361 (or 17356 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20440203025 its reverse (52030204402), we get a palindrome (72470407427).

The spelling of 20440203025 in words is "twenty billion, four hundred forty million, two hundred three thousand, twenty-five".